package com.mohan.gulimall.thirdmoudle.controller;

import com.aliyun.oss.OSS;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import com.mohan.common.utils.R;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

@RestController
public class OssController {

  @Autowired
  private OSS ossClient;
  @Value("${spring.cloud.alicloud.oss.endpoint}")
  private String endpoint;
  @Value("${spring.cloud.alicloud.access-key}")
  private String accessId;
  @Value("${spring.cloud.alicloud.secret-key}")
  private String accessKey;

  @RequestMapping("oss/policy")
  public R policy() {
    String bucket = "gulimall-mohan"; // 请填写您的 bucketname 。
    String host = "https://" + bucket + "." + endpoint; // host的格式为 bucketname.endpoint
    // callbackUrl为上传回调服务器的URL，请将下面的IP和Port配置为您自己的真实信息。
    //String callbackUrl = "http://88.88.88.88:8888";
    String format = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
    String dir = format + "/"; // 用户上传文件时指定的前缀。

    // 创建OSSClient实例。
    OSS ossClient = new OSSClientBuilder().build(endpoint, accessId, accessKey);
    Map<String, String> respMap = null;
    try {
      long expireTime = 30;
      long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
      Date expiration = new Date(expireEndTime);
      // PostObject请求最大可支持的文件大小为5 GB，即CONTENT_LENGTH_RANGE为5*1024*1024*1024。
      PolicyConditions policyConds = new PolicyConditions();
      policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
      policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

      String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
      byte[] binaryData = postPolicy.getBytes("utf-8");
      String encodedPolicy = BinaryUtil.toBase64String(binaryData);
      String postSignature = ossClient.calculatePostSignature(postPolicy);

      respMap = new LinkedHashMap<>();
      respMap.put("accessid", accessId);
      respMap.put("policy", encodedPolicy);
      respMap.put("signature", postSignature);
      respMap.put("dir", dir);
      respMap.put("host", host);
      respMap.put("expire", String.valueOf(expireEndTime / 1000));
      // respMap.put("expire", formatISO8601Date(expiration));


    } catch (Exception e) {
      // Assert.fail(e.getMessage());
      System.out.println(e.getMessage());
    } finally {
      ossClient.shutdown();
    }
    return R.ok().put("data",respMap);
  }
}
